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Finding the Fourth Proportional to 139,400.58, 192,376.54 and 75,742.68

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Solution

The fourth proportional to 139,400.58, 192,376.54 and 75,742.68 is: 104,526.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,400.58 : 192,376.54 = 75,742.68 : x
  2. Step 2: Convert to fraction form
    139,400.58/192,376.54 = 75,742.68/x
  3. Step 3: Cross multiply
    139,400.58x = 192,376.54 × 75,742.68
  4. Step 4: Simplify right side
    139,400.58x = 14,571,114,708.73
  5. Step 5: Solve for x
    x = 14,571,114,708.73/139,400.58
  6. Step 6: Final answer
    x = 104,526.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.